-- Carries interesting info for debugging / profiling of the
-- graph coloring register allocator.
+{-# OPTIONS_GHC -w #-}
+-- The above warning supression flag is a temporary kludge.
+-- While working on this module you are encouraged to remove it and fix
+-- any warnings in the module. See
+-- http://hackage.haskell.org/trac/ghc/wiki/WorkingConventions#Warnings
+-- for details
+
module RegAllocStats (
RegAllocStats (..),
regDotColor,
pprStatsSpills,
pprStatsLifetimes,
pprStatsConflict,
- pprStatsLifeConflict
+ pprStatsLifeConflict,
+
+ countSRMs, addSRM
)
where
import qualified GraphColor as Color
import RegLiveness
+import RegAllocInfo
import RegSpill
import MachRegs
import MachInstrs
+import Cmm
import Outputable
import UniqFM
import UniqSet
+import State
import Data.List
{ raGraph :: Color.Graph Reg RegClass Reg -- ^ the colored graph
, raPatched :: [LiveCmmTop] -- ^ code with vregs replaced by hregs
, raSpillClean :: [LiveCmmTop] -- ^ code with unneeded spill/reloads cleaned out
- , raFinal :: [NatCmmTop] } -- ^ final code
+ , raFinal :: [NatCmmTop] -- ^ final code
+ , raSRMs :: (Int, Int, Int) } -- ^ spill/reload/reg-reg moves present in this code
instance Outputable RegAllocStats where
$$ text "# Code with spills inserted."
$$ (ppr (raSpilled s))
- ppr (s@RegAllocStatsColored{})
+ ppr (s@RegAllocStatsColored { raSRMs = (spills, reloads, moves) })
= text "# Colored"
$$ text "# Register conflict graph."
$$ Color.dotGraph regDotColor trivColorable (raGraph s)
$$ text "# Final code, after rewriting spill/rewrite pseudo instrs."
$$ ppr (raFinal s)
$$ text ""
-
+ $$ text "# Score:"
+ $$ (text "# spills inserted: " <> int spills)
+ $$ (text "# reloads inserted: " <> int reloads)
+ $$ (text "# reg-reg moves remaining: " <> int moves)
+ $$ text ""
-- | Do all the different analysis on this list of RegAllocStats
pprStats :: [RegAllocStats] -> Color.Graph Reg RegClass Reg -> SDoc
:: [RegAllocStats] -> SDoc
pprStatsSpills stats
- = let -- slurp out the stats from all the spiller stages
- spillStats = [ s | s@RegAllocStatsSpill{} <- stats]
+ = let
+ finals = [ s | s@RegAllocStatsColored{} <- stats]
- -- build a map of how many spill load/stores were inserted for each vreg
- spillSL = foldl' (plusUFM_C accSpillSL) emptyUFM
- $ map (spillStoreLoad . raSpillStats) spillStats
-
- -- print the count of load/spills as a tuple so we can read back from the file easilly
- pprSpillSL (r, loads, stores)
- = (parens $ (hcat $ punctuate (text ", ") [doubleQuotes (ppr r), int loads, int stores]))
-
- -- sum up the total number of spill instructions inserted
- spillList = eltsUFM spillSL
- spillTotal = foldl' (\(s1, l1) (s2, l2) -> (s1 + s2, l1 + l2))
- (0, 0)
- $ map (\(n, s, l) -> (s, l))
- $ spillList
+ -- sum up how many stores/loads/reg-reg-moves were left in the code
+ total = foldl' addSRM (0, 0, 0)
+ $ map raSRMs finals
in ( text "-- spills-added-total"
- $$ text "-- (stores, loads)"
- $$ (ppr spillTotal)
- $$ text ""
- $$ text "-- spills-added"
- $$ text "-- (reg_name, stores, loads)"
- $$ (vcat $ map pprSpillSL $ spillList)
+ $$ text "-- (stores, loads, reg_reg_moves_remaining)"
+ $$ ppr total
$$ text "")
$$ text "\n")
+-- | Count spill/reload/reg-reg moves.
+-- Lets us see how well the register allocator has done.
+--
+countSRMs :: LiveCmmTop -> (Int, Int, Int)
+countSRMs cmm
+ = execState (mapBlockTopM countSRM_block cmm) (0, 0, 0)
+
+countSRM_block (BasicBlock i instrs)
+ = do instrs' <- mapM countSRM_instr instrs
+ return $ BasicBlock i instrs'
+
+countSRM_instr li@(Instr instr live)
+ | SPILL reg slot <- instr
+ = do modify $ \(s, r, m) -> (s + 1, r, m)
+ return li
+
+ | RELOAD slot reg <- instr
+ = do modify $ \(s, r, m) -> (s, r + 1, m)
+ return li
+
+ | Just _ <- isRegRegMove instr
+ = do modify $ \(s, r, m) -> (s, r, m + 1)
+ return li
+
+ | otherwise
+ = return li
+
+-- sigh..
+addSRM (s1, r1, m1) (s2, r2, m2)
+ = (s1+s2, r1+r2, m1+m2)
+
-----
-- Register colors for drawing conflict graphs
-- Keep this out of MachRegs.hs because it's specific to the graph coloring allocator.